kafka-streams/lib/KafkaFactory.js

kafka-streams for Node.js

"use strict";

const debug = require("debug")("kafka-streams:kafkafactory");

const JSKafkaClient = require("./client/JSKafkaClient.js");
const NativeKafkaClient = require("./client/NativeKafkaClient.js");

class KafkaFactory {

    /**
     * helper for KafkaStreams to wrap
     * the setup of Kafka-Client instances
     * @param config
     * @param batchOptions - optional
     */
    constructor(config, batchOptions = undefined) {

        if (!config) {
            throw new Error("kafka factory constructor expects a configuration object.");
        }

        this.config = config;
        this.batchOptions = batchOptions;
    }

    getKafkaClient(topic) {

        if (this.config.noptions && typeof this.config.noptions === "object") {
            debug("creating new native kafka client");
            return new NativeKafkaClient(topic, this.config, this.batchOptions);
        }

        if (this.batchOptions) {
            debug("WARNING: batchOptions are omitted for the JS client.");
        }

        debug("creating new js kafka client");
        return new JSKafkaClient(topic, this.config);
    }
}

module.exports = KafkaFactory;